Is this your main idea? Meaning

1 answer:

8 0

While the main idea is usually in the first sentence, the next most common placement is in the last sentence of a paragraph.

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Evaluate the expression when c=5 and x= -5.<br> -9c+x

Nostrana [21]

Answer:

-59

Step-by-step explanation:

-9(5)+(-5)

-45-5

-50

7 0

3 years ago

A retail store did research and determined that, on average, each customer spends 40 minutes in their store per visit, with a st

Blababa [14]

Answer:

0.13% of customers spend more than 46 minutes

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 40, \sigma = 2$